﻿<html>
 <body>
  <script>
   x = 5+5;
   document.write(x);
   document.write("<br>");

   x  = "5" + 5;
   document.write(x);
   document.write("<br>")
 
   x  = 5 + "5";
   document.write(x);
   document.write("<br>")
   
   x  = "5" + 5;
   document.write(x);
   document.write("<br>")
  </script>
 </body>
 </html>